state the principal of conservation of …

  Use app Login Class 11 >>Physics >>Work, Energy and Power >>Energy Conversions >>State and prove law of conservation of e Question  State and prove law of conservation of energy in case of freely falling body? Medium Open in App Solution  Verified by Toppr Law of conservation of energy states that:− Energy can neither be created nor be destroyed. Energy transforms from one form to another form and, potential energy+ kinetic energy= constant Proof:− At point A K.E=0m/s P.E=mgh P.E=mgh At point B, K.E., 2gh=V2−O2 V2=2gx K.E=21​mV2 K.E=21​m.2gx K.E=mgx-----------------------------(1) P.E=mgh P.E=m.g.(h−x) P.E=mgh−mgx---------------------(2) from(1) and (2) K.E+P.E constant mgx+mgh−mgx=mgh mgh=mgh At point C,  P.E=0 2gh=v2